regcomp.c: Avoid function call overhead

We don't need to call a function to convert from UTF-8 when the value is
invariant in and out of UTF-8.

1 files changed, 1 insertions, 1 deletions

diff --git a/regcomp.c b/regcomp.c
index 2a0350ca07..d3635cc8d6 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -13491,7 +13491,7 @@ parseit:
         }
         else {
             /* Is a backslash; get the code point of the char after it */
-	    if (UTF) {
+	    if (UTF && ! UTF8_IS_INVARIANT(RExC_parse)) {
 		value = utf8n_to_uvchr((U8*)RExC_parse,
 				   RExC_end - RExC_parse,
 				   &numlen, UTF8_ALLOW_DEFAULT);